The invention provides measuring devices for managing the weight of animals and methods of using the measuring devices. In a general aspect, the measuring devices comprise a container having a first side with a cavity and a second opposing side having a cavity that is larger than the cavity of the first side. The first side cavity is sized to hold an amount of food that restricts calorie intake of an animal. The second side cavity is sized to hold an amount of food that provides daily requirement for weight management of an animal.